[jira] Resolved: (HADOOP-1728) Hadoop should allow the task trackerto to have different mapper/reducer task limits

["Devaraj Das (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-1728?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Devaraj Das resolved HADOOP-1728.
---------------------------------

    Resolution: Duplicate

Duplicate of HADOOP-1274

> Hadoop should allow the task trackerto to have different mapper/reducer task limits
> -----------------------------------------------------------------------------------
>
>                 Key: HADOOP-1728
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1728
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: mapred
>            Reporter: Runping Qi
>
> Right now, Hadoop has one configuration variable to set the limit on the number of tasks 
> per task tracker. That number applies to both the mappers and reducers. However, in many
> cases, it make a lot of sense to set different limits on them, For example, since mappers 
> are typically take less resources than reducers, we can set 4 as the limit on mappers
> and 2 on reducers. This will improve the cluster utilization and improve the
> overall performance.

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